package cn.com.easy.utils;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * web判断是否是移动端访问
 * 
 * @author nibili 2017年6月11日
 * 
 */
public class WebCheckMobileUtils {

	// \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),
	// 字符串在编译时会被转码一次,所以是 "\\b"
	// \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)
	static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i" + "|windows (phone|ce)|blackberry" + "|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"
			+ "|laystation portable)|nokia|fennec|htc[-_]" + "|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";
	static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser" + "|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";

	// 移动设备正则匹配：手机端、平板
	static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);
	static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);

	/**
	 * 检测是否是移动设备访问
	 * 
	 * @Title: check
	 * @Date : 2014-7-7 下午01:29:07
	 * @param userAgent
	 *            浏览器标识
	 * @return true:移动设备接入，false:pc端接入
	 */
	public static boolean check(String userAgent) {
		if (null == userAgent) {
			userAgent = "";
		}
		// 匹配
		Matcher matcherPhone = phonePat.matcher(userAgent);
		Matcher matcherTable = tablePat.matcher(userAgent);
		if (matcherPhone.find() || matcherTable.find()) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 * 检查访问方式是否为移动端
	 * 
	 * @Title: check
	 * @Date : 2014-7-7 下午03:55:19
	 * @param request
	 * @throws IOException
	 */
	public static boolean check(HttpServletRequest request, HttpServletResponse response) throws IOException {
		boolean isFromMobile = false;

		HttpSession session = request.getSession();

		try {
			// 获取ua，用来判断是否为移动端访问
			String userAgent = request.getHeader("USER-AGENT").toLowerCase();
			if (null == userAgent) {
				userAgent = "";
			}
			isFromMobile = WebCheckMobileUtils.check(userAgent);
			// 判断是否为移动端访问
			if (isFromMobile) {
				System.out.println("移动端访问");
				session.setAttribute("ua", "mobile");
			} else {
				System.out.println("pc端访问");
				session.setAttribute("ua", "pc");
			}
		} catch (Exception e) {
		}

		return isFromMobile;
	}

}
